Sub-Poisson-Binomial Light

Abstract

We introduce the general parameter Q_PB that provides an experimentally accessible nonclassicality measure for light. The parameter is quantified by the click statistics obtained from on-off detectors in a general multiplexing detection setup. Sub-Poisson-binomial statistics, observed by Q_PB<0, indicates that a given state of light is nonclassical. Our new parameter replaces the binomial parameter Q_B for more general cases, where any unbalance among the multiplexed modes is allowed, thus enabling the use of arbitrary multiplexing schemes. The significance of the parameter Q_PB is theoretically examined in a measurement setup that only consists of a ring resonator and a single on-off detector. The proposed setup exploits minimal experimental resources and is geared towards a fully integrated quantum nanophotonic circuit. The results show that nonclassical features remain noticeable even in the presence of significant losses, rendering the new nonclassicality test more practical and flexible to be used in various nanophotonic platforms.

6 pages, 5 figures

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• Neural-network approach for identifying nonclassicality from click-counting data
• Identification of nonclassical properties of light with multiplexing layouts
• Detection-device-independent verification of nonclassical light
• Quantum illumination with multiplexed photodetection
• Detector-Agnostic Phase-Space Distributions
• Experimental retrieval of photon statistics from click detection
• Theoretical studies on quantum imaging with time-integrated single-photon detection under realistic experimental conditions